If machine's like Ares Miner 256 MH/s actually exist, wouldn't be too inconceivable to have the stated 850 GH/s. Yes, I know, the "Math" doesn't add up on things, just saying.
Either way, only time and patience will say whether the site comes back up or stay's down. Yes, I know it is also entirely possible from some people's point of view that the whole thing is a Ponzi and would make some sense with that argument as well.
All I am saying is at the end of the day, You don't know what you don't know.
As far as "proven" Cloud mining, there is Genesis (SLOW ROI), Hashnest (A bit better than most on ROI), Mining Sweden (Not Sure of their ROI honestly, also fairly new still so not 100% certain with this one), I think there are some others out there but their ROI's are really slow.
Investment sites, I am going to guess probably 90% are ponzi's, you Can try BTER at 10% yearly Interest Rate.
If you really want to make money though with Bitcoin I think the better option is to play the Markets, granted that is time consuming, Or you could always try Loan sites Like BTCJam or BTClend, basically you invest in someone's loan and they pay back in whatever interest rate is set.
I know you're not getting paid jack shit this week, and likely into the future, because things based on lies beget other lies. Maybe Marcelo will be the first cloud scamming operator to "recover" from the "hacks" but I wouldn't bet on it. And if you think it's not too inconceivable for one company to own and operate 850 Gh/s of Scrypt hardware you're only proving your own ignorance on the subject of mining.
I asked Marcelo and he said they were running Gridseed chips.
Doing some math, they would need 13,076,923 Gridseed chips to = 850GH/s
I also asked if it was the G-Black, and he said no, it was a custom build.
G-Blacks are 400 chip machines. If he had those it would take 32692 G-Blacks to = 850GH/s